Add Adaptive Lighting Mode System foundation (Phase 1)

Implement the foundation for a comprehensive mode-based lighting control
system for Inovelli Blue Dimmer Switches with Adaptive Lighting integration.

This Phase 1 implementation includes:

- Global mode definitions package (packages/adaptive_lighting_global.yaml)
  containing ROYGBIV color scheme mappings and mode settings for all
  standard modes (Adaptive, Reading, Theater, Sleep, etc.)

- Inovelli mode cycling blueprint (blueprints/automation/inovelli_mode_cycling.yaml)
  enabling config button to cycle through lighting modes with LED feedback

- Updated README with system overview, features, and quick start guide

The system provides room-specific lighting modes with visual LED feedback,
config button control, and git-trackable configuration via Home Assistant
packages.

Next phases will add mode application automations, button action blueprints,
presence integration, and comprehensive documentation.

packages/adaptive_lighting_global.yaml

@@ -0,0 +1,170 @@
+# packages/adaptive_lighting_global.yaml
+#
+# Global constants for Adaptive Lighting Mode System
+# This file is shared across all rooms and should be version controlled.
+#
+# To use: Place in config/packages/ directory
+# Enable packages in configuration.yaml:
+#   homeassistant:
+#     packages: !include_dir_named packages/
+
+# =============================================================================
+# MODE COLOR MAPPINGS (ROYGBIV Scheme)
+# =============================================================================
+# These colors are used for LED feedback on Inovelli switches
+# Values are hue (0-255) for Zigbee2MQTT ledColorWhenOn/Off parameter
+#
+# Reference ADAPTIVE_LIGHTING_CONTROL_SYSTEM_DESIGN.md lines 112-131
+# =============================================================================
+
+input_text:
+  adaptive_lighting_mode_colors:
+    name: "AL Mode Color Mappings (JSON)"
+    initial: >-
+      {
+        "Adaptive": 170,
+        "Reading": 42,
+        "Relaxing": 21,
+        "Sleep": 0,
+        "Manual Override": 212,
+        "Theater": 127,
+        "Party": 234,
+        "Homework": 85,
+        "Play": 148,
+        "Cooking": 42,
+        "Dining": 21,
+        "Cleanup": 170
+      }
+
+# =============================================================================
+# MODE SETTINGS DEFINITIONS
+# =============================================================================
+# Standard settings for each mode
+# Used as reference when creating mode application automations
+# =============================================================================
+
+  adaptive_lighting_mode_settings:
+    name: "AL Mode Settings Reference (JSON)"
+    initial: >-
+      {
+        "Adaptive": {
+          "description": "Standard AL following sun",
+          "use_defaults": "configuration"
+        },
+        "Reading": {
+          "description": "Bright, cool white",
+          "min_brightness": 80,
+          "max_brightness": 100,
+          "min_color_temp": 4500,
+          "max_color_temp": 5500,
+          "transition": 2
+        },
+        "Relaxing": {
+          "description": "Dim, warm white",
+          "min_brightness": 20,
+          "max_brightness": 40,
+          "min_color_temp": 2000,
+          "max_color_temp": 2500,
+          "transition": 5
+        },
+        "Sleep": {
+          "description": "Very dim red/amber",
+          "min_brightness": 1,
+          "max_brightness": 5,
+          "min_color_temp": 2000,
+          "max_color_temp": 2000,
+          "sleep_rgb_color": [255, 50, 0],
+          "transition": 2
+        },
+        "Theater": {
+          "description": "Dim, cool for movies",
+          "min_brightness": 5,
+          "max_brightness": 20,
+          "min_color_temp": 3000,
+          "max_color_temp": 4000,
+          "transition": 3
+        },
+        "Party": {
+          "description": "Bright, dynamic for socializing",
+          "min_brightness": 60,
+          "max_brightness": 90,
+          "min_color_temp": 3500,
+          "max_color_temp": 4500,
+          "transition": 1
+        },
+        "Homework": {
+          "description": "Bright, neutral for focus",
+          "min_brightness": 85,
+          "max_brightness": 100,
+          "min_color_temp": 4000,
+          "max_color_temp": 5000,
+          "transition": 2
+        },
+        "Play": {
+          "description": "Medium bright, energizing",
+          "min_brightness": 60,
+          "max_brightness": 85,
+          "min_color_temp": 4000,
+          "max_color_temp": 5000,
+          "transition": 2
+        },
+        "Cooking": {
+          "description": "Bright, cool task lighting",
+          "min_brightness": 90,
+          "max_brightness": 100,
+          "min_color_temp": 4500,
+          "max_color_temp": 5500,
+          "transition": 1
+        },
+        "Dining": {
+          "description": "Medium, warm for meals",
+          "min_brightness": 40,
+          "max_brightness": 70,
+          "min_color_temp": 2500,
+          "max_color_temp": 3500,
+          "transition": 3
+        },
+        "Cleanup": {
+          "description": "Bright, standard for cleaning",
+          "min_brightness": 80,
+          "max_brightness": 100,
+          "min_color_temp": 4000,
+          "max_color_temp": 5000,
+          "transition": 1
+        }
+      }
+
+# =============================================================================
+# HELPER SCRIPTS
+# =============================================================================
+
+script:
+  get_mode_color:
+    alias: "Get LED Color for Mode"
+    description: "Returns the LED color value (0-255) for a given mode name"
+    fields:
+      mode:
+        description: "Mode name (e.g., 'Reading', 'Sleep')"
+        example: "Reading"
+    sequence:
+      - stop: "Color retrieved"
+        response_variable: "color"
+        response:
+          color: >-
+            {% set colors = state_attr('input_text.adaptive_lighting_mode_colors', 'state') | from_json %}
+            {{ colors.get(mode, 170) }}
+
+  get_mode_settings:
+    alias: "Get AL Settings for Mode"
+    description: "Returns the AL settings dictionary for a given mode"
+    fields:
+      mode:
+        description: "Mode name"
+        example: "Reading"
+    sequence:
+      - stop: "Settings retrieved"
+        response_variable: "settings"
+        response:
+          settings: >-
+            {% set all_settings = state_attr('input_text.adaptive_lighting_mode_settings', 'state') | from_json %}
+            {{ all_settings.get(mode, {}) }}